Oops, this is just the border of Salisbury Beach State Reservation.
http://www.topozone.com/map.asp?
z=19&n=4742933&e=351401&s=50&size=m&datum=nad83&layer=DRG25
--- In
BoundaryPoint@yahoogroups.com, Michael Kaufman
<mikekaufman79@y...> wrote:
> MANH state line - while the border approximately
> follows the Merrimack at some general distance offset
> ( http://ma.water.usgs.gov/basins/merrimack.htm
> ), it is monumented and the border is the standard
> series of straight lines as depicted on Topozone (
> http://www.topozone.com/map.asp?
z=19&n=4747939.00011567&e=351357.999989004&datum=nad83
> and westward).
> And in that Topozone map - is that a
> Salisbury-Seabrook-Massachusetts tripoint? NH towns
> have more ocean territorry than MA towns? And is it
> up to the three Nautical mile limit?
>
> --- aletheiak <aletheiak@y...> wrote:
> > arif
> > i too believed in this arc report about easternmost
> > gmsn
> > & may even have been responsible for starting the
> > rumor about it
> > but i have been unable to substantiate it
> >
> > this border is set at a fixed distance from the
> > river on both sides
> > presumably from both its banks rather than from its
> > thalweg
> > just like the manh state line is offset from the
> > merrimack
> > except doubly so
> > as you probably also realized
> > & can see here
> >
> http://www.lib.utexas.edu/maps/africa/gambia_pol88.jpg
> >
> > however
> > as beguilingly arclike as all this may seem
> > such a regime would not actually presuppose any true
> > arcs at all
> >
> > except
> > i would agree
> > conceivably a single one centered at the headspring
> >
> >
> > however
> > the source of the gambia river is not in gambia
> > but in senegal
> > as you can also see in the above map
> > & therefore the simple offset regime couldnt project
> > such a
> > simple terminal arc sector
> >
> > only by varying the apparent regime & reducing it to
> > a single
> > offset center point in the middle of the river
> > could such a final true arc have been produced
> >
> >
> > also the map doesnt show any such terminal rounding
> > or bulge
> > as one would expect in such a case
> > but quite the contrary
> > something more like a foreshortening or truncation
> > of the basic regime
> > & indeed it makes the cutoff point look quite
> > arbitrary & artificial
> > & somehow distinctly at odds with the basic offset
> > regime
> >
> >
> > so at this point i think the existence of an arc on
> > gmsn hasnt
> > been & probably wont be demonstrated
> > & was just a wishful thought & misconception in the
> > first place
> >
> >
> > mind you
> > i dont actually know how the gmsn border does
> > accomplish this
> > remarkable turnabout at its east end if not in some
> > approximation of an arc or arcs
> >
> > & i can still imagine how it might somehow involve a
> > true arc or 2
> > based at some known terminal cross section of the
> > river
> >
> > but i dont believe there is any text that specifies
> > to this effect
> > nor any map that suggests it
> >
> >
> >
> > meanwhile
> > i have scoured the ghost frgb lines of the period
> > & have discovered nothing new
> > so our world class border arc census is again
> > stalled
> > at a top count of about 20 now & perhaps forever
> >
> > --- In BoundaryPoint@yahoogroups.com, Arif Samad
> > <fHoiberg@y...> wrote:
> > > Not sure, but isn't there some (at least one arc)
> > in
> > > the border of Senegal and Gambia. As far as I
> > > thought, the Easternmost point is directly east of
> > the
> > > Center of the arc in that border.
> > > Arif
> > >
> > >
> > >
> > >
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